PBSE1095

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描述

PBSE1095

就以三菱FX2为例:先打开串口监控软件(到网上百度一下就有很多),监控串口的进出数据。然后让再运行FXWIN(PLC编程软件)和PLC联机,选了型号后点程序读取这时候在串口监控软件中可以看见电脑和PLC间互发了几串字符,最后一行由PLC发给电脑的就是密码,只是它是ASII码对照一下表格,把它翻译成字符就得出密码了。呵,这是三菱PLC的漏洞,它的编程软件是先将密码读到电脑内存在和用户输入的密码进行比较,密码对就可以读出程序。我试验了一下,用串口软件把倒数第二行字符发到PLC,PLC同样返回了密码。说到这大家知道这个解密软件怎么做了吧?整个解密软件只要发一串字符到PLC,再把PLC返回的带密码的字符翻译成密码就可以了。有些PLC就没这样的漏洞了,像OMRON和FUJINB2,它们都是把用户输入的密码传到PLC由PLC判断密码是否正确才判定能否读取程序。
    对付它们就用第二种方法了,暴力破解:同样运行串口监控软件,打开编程软件联机,点程序读取,再输入密码1234,如果读出了程序,那就不用解了。如果显示密码错误,那就看看监控软件里的数据.查找1234这个字符串,在含有1234的字符后会有一行PLC返回的表示密码错误的信息,把这行错误信息记录下来。然后打开VB,做个小工程:让电脑发那行含有1234的字符串到串口,当然,要有个循环语句,就是把1234改成从0000到FFFF,让电脑不停的尝试。用IF语句把返回的信息和刚才记录下来的那条错误信息比较,如果信息不同则停止尝试,试到的密码就是PLC的密码了。
    看到这您是否已经感觉到PLC加密技术也不过如此。海阔天空的感觉。恭喜你,说明你已经领会了加密和解密的真理。具体的实现方法很多种。但领会真理是最重要也是最难的。俗话说:大道无术,中到有形,小道若巧。呵呵,先说到这吧,一些细节一时半会也不能介绍的太清楚。大家自己动手多尝试,多动脑,多领悟定有收获。
    记住,我们掌握加解密技术只是为了更好的学习,切勿用于其它非法用途哦。在这里提个醒,以免误人子弟了。

产品承诺:
保 证 全新原装进口,
保 证 安全准时发货,
保 证售后服务质量,
优势价格,大量现货。

主营DCS系统配件
机器人系统配件
大型伺服系统配件
品牌:ABB   ,AB  ,GE,FOXBORO,本特利,英维思,伍德沃德,西屋,瑞恩,施耐德,西门子,摩托罗拉,安川。力士乐。ACSO,横河等进口品牌。 专业销售进口DCS  PLC系统备件模块
Triconex Siemens Yaskawa ABB GE Ovation AB Foxboro Motorola Schneider XYCOM KUKA
  专业销售进口DCS  PLC系统备件模块 15天包退换 一年质保 大量现货  国内实力库存商家

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Enlarge
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Varian 1000L/S Ion Vacuum Pump Leybold

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Oil Separator Filters fit Leybold SV.630 vacuum pump

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Leybold Thermovac Vacuum Controller TM 22 TM22 89684
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Leybold System Controller 307285-2003
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Ruvac Leybold Vacuum Blower Pump WA1000 89513-1

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Leybold Turbotronik NT 1000/1500 Pump Controller AMAT

Leybold Turbotronik controller NT 340 M Turbo Pump

Leybold Heraeus IONIVAC IM210D

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USED LEYBOLD TRI-VAC VACUUM PUMP 72075040 D30A 1-1/2hp

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Leybold Heraeus Turbotronik NT 150/360 Controller

PCB, Power supply , Leybold Inficon P/N 19527

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Filter kit fits Leybold SV500 Vacuum Pump

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LEYBOLD TRIVAC D16E Vacuum Pump

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Inficon Leybold-Heraeus 017-604 RGA Head

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Leybold Inficon 850-200-G1 Vacuum Gauge

LEYBOLD D8B USPP D8B

Leybold Oerlikon EIS 16097 Electrical Indicator System
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LH Leybold: CFS 40-65 Chemical Filter Safety Iso. Val.

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Filter kit fits Leybold SV200 Vacuum Pump

Filter kit fits Leybold SV300 Vacuum Pump

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Leybold 27511B4 Vacuum Pendulum Valve

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Oil Separator Filters fit Leybold SV.300 vacuum pump

Leybold OF-1000 Oil Filtration System. Good, Used.

Enlarge
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LOT LEYBOLD VACUUM VALVE EV-25-EM BURKERT MICR-0256-SI

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Leybold OF-1000 Oil filtration system

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Leybold Inficon XPR2 Interlock Heater P/N 914-408-P1
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专业销售进口DCS  PLC系统备件模块

PLC模块,可编程控制器,CPU模块,IO模块,AI模块,通讯模块。AB/施耐德/ABB/GE/本特利/西屋/英维斯/霍尼韦尔/黑马/FU克斯波罗

15天包退换 一年质保 大量现货  国内实力库存商家


选择深圳长欣,选择放心,售后无忧大量现货,当天顺丰发货!
主营:本特利,英维思,伍德沃德,福克斯波罗、西屋、瑞恩、施耐德莫迪康、ABB、AB、西门子、摩托罗拉、GE发那科、安川、博世力士乐,ACSO,力士乐等各大品牌的DCS系统配件,机器人系统配件,大型伺服系统备件。

先介绍几点经验。
1、先通读一遍“系统手册”(不管能不能看懂,先了解个大概,以便学习编程时查找);
2、由位控逻辑入手,逐渐增加定时、计数等条件,把或、与、非关系理顺;
3、进而练习整数运算、实数运算、类型转换;
4、量程转换、PID调节回路的建立及P、I、D参数的理解(最好是有个物理回路验证,比如变频器+电机+测速传感器);
5、循环、顺序、跳转等程序控制(尽量避免跳转,非跳不可时也是跳的越近越好);
6、中断、通讯、位置控制....

本人以ABB工业机器人配件DSQC系列和Motorola MVME系列,GE 卡件 模块 驱动器系列为主攻。各位电工朋友可根据自己的条件选择适合自己的PLC品牌,由于PLC的基本框架大同小异,学会一种至于其它的学习起来也就简单了。